Been away at cabin, no internet there. When we had thick ice I got a couple of tons of 8" or larger rock. Took a wheelbarrow and made several piles a couple feet high. In spring I used my underwater camera for ice fishing to check it out. When the stones fell thru the ice I had little reefs at least 18" high. I did have some reproduction before doing this. Not sure I`m currently having reproduction as haven`t had time to really check things out.
